19996056 has 96 divisors (see below), whose sum is σ = 58406400. Its totient is φ = 6160320.

The previous prime is 19996049. The next prime is 19996061. The reversal of 19996056 is 65069991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64141 + ... + 64451.

It is an arithmetic number, because the mean of its divisors is an integer number (608400).

Almost surely, 2^19996056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19996056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29203200).

19996056 is an abundant number, since it is smaller than the sum of its proper divisors (38410344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19996056 is a wasteful number, since it uses less digits than its factorization.

19996056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 19996056 is about 4471.6949806533. The cubic root of 19996056 is about 271.4239177147.

The spelling of 19996056 in words is "nineteen million, nine hundred ninety-six thousand, fifty-six".